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The Hadiths. (These have been collected in several collections of which Sahih Al-Bukhari and Sahih Al-Muslim are the most respected.)
yes
The folowing books are the most famous collectings of the sayings of Hazrat Muhammad SAW.: 1. Al-Sahih Al-Bokhari 2. Al Sahih Al-Muslim, 3. Mota Imam Malik, 4. Tirmazi Sharif, 5. Ibn-i-Maja
The qur'an is the basic source of Islam. Other books are the collections of the sayings of holy Prophet (SAW) like Sahih Bokhari, Sahih Muslim and Mota Imam Malik.
The Holy Quran and Sahih Hadith
Najmul Huq has written: 'Sahih jindegi'
1) Sahih Al Bukhari 2)Sahih Muslim 3)Sunan Abu Dawod 4)Sunan Al Sughra 5)Jami Al Tirmidi 6)Sunan Ibn Majah
Shahiduddin has written: 'Sahih lughatulqur'an' -- subject(s): Dictionaries, Koran
The names of the collections come from the fact that the collections were seen to refer to the roughly 10% of Hadiths that were accurate or sahih (صحيح) in Arabic. The second name refers to the scholar who compiled the list, al-Bukhari (البخاري) or al-Muslim (المسلم). The two scholars, even though they used the same method to determine which hadiths were sahih and which were not, came up with distinct lists of what hadiths they believed were sahih. While they agreed on a large number of hadiths, the disagreements are noticeable and this is why there are different hadiths in the different collection. Other hadith collectors, like Abu Darda have still other hadiths that they consider sahih, but are rejected by both al-Bukhari and al-Muslim.
saheeh(sahih) hadith means authentic hadith ... insense the hadith is considered true and valid
The folowing books are the most famous collectings of the sayings of Hazrat Muhammad SAW.: 1. Al-Sahih Al-Bokhari 2. Al Sahih Al-Muslim, 3. Mota Imam Malik, 4. Tirmazi Sharif, 5. Ibn-i-Maja
How many?If you mean how many hadith narrations there are, the answer is "lots", but sunni Muslims regard 5 hadith collections as Authentic narrations these include Sahih Bukhari, Sahih Muslim, Imam Malik's Muwatta, Sunan Al-Tirmidhi, Sunan An-Nasai and Sunan Abu Daud. Collectively they have around thousands of hadiths.